<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>认识 CSS</title>
	<style>
		h1 {
			color: red;
			font-size: 20px;
		}
	</style>
</head>
<body>
	<h1>我是一级标题</h1>
	<p>我是一段文本段落</p>
</body>
</html>





